android_webview: Let AwContents manage TouchHandleDrawable

android_webview/browser/browser_view_renderer.cc

Index: android_webview/browser/browser_view_renderer.cc
diff --git a/android_webview/browser/browser_view_renderer.cc b/android_webview/browser/browser_view_renderer.cc
index 63e2f5cefaf497af9d25029a2336dd7a74e26aa2..17807e254bfb436194399199288f664ec584d7cc 100644
--- a/android_webview/browser/browser_view_renderer.cc
+++ b/android_webview/browser/browser_view_renderer.cc
@@ -700,6 +700,10 @@ void BrowserViewRenderer::DidOverscroll(
   client_->DidOverscroll(rounded_overscroll_delta, fling_velocity_pixels);
 }
 
+ui::TouchHandleDrawable* BrowserViewRenderer::CreateDrawable() {
+  return client_->CreateDrawable();
+}
+
 void BrowserViewRenderer::PostInvalidate(
     content::SynchronousCompositor* compositor) {
   TRACE_EVENT_INSTANT0("android_webview", "BrowserViewRenderer::PostInvalidate",